Concrete-mixer.



J. P. & M. GILSON.

CONCRETE MIXER.

APPLICATION FILED FEB. 5. 1917.

1,237,028. Patenteil Aug. 14, 1917.

Q QQ A @mdwQoW AA (7011 J JOH N P. GILSOIN' AND MICHAEL GILSOIL OFFREDOI VIA, WISCONSIN.

- CONCRETE-MIXER.

Specification of Letters Patent.

4 BEieSUE Application filed February 5, 1917. Serial No. 146,682.

To all whom itv nay concern:

Be it known that 'we, JOHN P. GILSON and MICHAEL GrLsoN, both citizensof the United States, and residents of Fredonia, in the county of'Ozaukee and State of Wmconsin, have invented certain new and usefulImprovements in Concrete-Mixers; and we do hereby declare that thefollowing is a full, clear, and exact description thereof.

Our invention relates to new and useful improvements in concrete mixers,more particularly of that simpler type embodying a.

drum rotatably mounted in a yoke having a horizontal pivotal axis,whereby the drum may be dumped by swinging the yoke on its axis. 1

It is in general the object of our invention to simplify and strengthenthe structure and to improve the efliciency of concrete mixers of thisgeneral nature, and it is more particularly an object to distribute theload strain of the mixing drum when in its operative mixing position,so, as to relieve the bearing connection of the yoke and drum.

With-the above and other objects and advantages in view, the inventionresides more particularly in the novel combination, formation andarrangement of parts hereinafter described and pointed out in theappended claims. 4

In the drawings:

Figure 1 is a vertical sectional view taken through a mixer constructedin accordance with our invention.

Fig. 2 is a horizontal sectional view throng the supporting frame of thedrum on the line 2--2of Fig. 1.

Fig. 3 is a detail view slrowing the adjustable means for holding thedrum in meshing engagement with its driving gear.

Referring now more particularly to.the

accompanying drawings, the supporting frame for the drum comprises endskeleton standards 5 connected at their lower ends by a pair of skidbeams 6 and by a beam 7 disposed adjacent their lower ends. The upperends of the standards forming journals 7 receiving pintles 8 at the endsof the arms of a relatively wide drum supporting yoke 9, the pintles 8being preferably in the form of sleeves integral with the yoke arms.

The mixing drum comprises a pan-shaped bottom casting 10 and an annularmouth casting 11 having its outer portion taperingly reduced tofacilitate discharge, and these plate 12 bolted thereto.

castings are connected by a cylindrical wall For journally mounting thedrum in the yoke 9, the bottom casting thereof is provided with anoutwardly projecting boss '13 engageable in a socket portion of anoutwardly projected boss 14 on the bight of the yoke, and both PatentedAug. 14, 1917.

bosses are bored for the reception of a pivot bolt 15 fixedly secured inthe drum boss 13. Thus a bearing for the bottom end of the drum isafforded by the shaft 15, and also by the disposition of the boss 13 inthe socket portion 14. 'An and thrust bearing for the drum is formed byball bearings 16 between the bosses. e

For rotating the drum, and for also affording a support for the mouthend thereof to relieve strain from the bearing of the inner end of thedrum, the mouth casting of the drum is provided with an annular seriesof gear teeth 17 and these gear teeth mesh with the teeth of a gearwheel 18 carried on a shaft 19 journaled in bearings 20 on a beam 21which is carried by-forwardly extending brackets 22 at the intermediateportion of the end standards 5. This gear wheel 18 is driven by a shaft23 journaled in bearings 24 on the said beam 21 and carrying a gear 25'meshing with bevel teeth on whereby to discharge the contents of the.mixer. For effecting this vertical swinging movement of the drum, anoperating handle 29 is secured by the bolt 30 to one of the pintles 8.To provide a means whereby the drum is positively held inproper meshingengagement of its teeth 17 with the gear of the gear wheel 18. Fixed onthe.

wheel 18, the handle is extended past the bolt to form an abutting face31 and intermediately pivoted to the adjacent standard 5 is a pawl 32having a bolt 33 threaded in one end and adapted to abut the face 31 ofthe lever, inward slipping movement being revented by a lug 34 on thelever.- The olt 33 provides an adjustment whereby an exact meshingrelation of'the gear teeth may 11!) gear wheels, and means for rotatingsaid be insured, and the pawl upon being swung readily releases the drumfor movement to its dumping position.

For rotating the drum 1n its dumped position, the shaft 19 is extendedthereunder in a downwardly inclined direction and carries.at its lowerend a gear wheel 35 adaptvertically tiltable drum, one end of saiddrumbeing open, a support for said drum,

means for rotating the drum in one direction when its open end isdisposed upwardly, means for rotating the drum in a reverse directionwhen said open end is disposed downwardly, including a continuouslyrotatable shaft disposed substantially parallel to the axis of the drum,a pair of gear wheels on the shaft, peripheral gear teeth on the drumadapted to be selectively meshed with the tgear teeth, and means forrotating said sha t.

2. A concrete mixer comprising a hori'-' zontally rotatable drumsupport, a mixing drum having one end rotatably secured to the support,an inclined shaft journaled under the drum, a pair of gear wheels on theshaft, peripheral gear teeth on the mixing drum, adapted to selectivelymesh with the shaft.

3. A concrete mixer comprising a support, a mixing drum rotatablysecured therein, a shaft journaled under the drum sub- I bination,a-pair of supporting standards,

a mixing drum rotatably and vertically mounted between said standards,peripheral gear teeth on the drum, a forwardly extendingbracket formedon each standard, a transverse beam carried by said brackets,transversely extending and alined' arms. formed on said beam, bearingsin said arms, a shaft journaled in said bearings and extendingsubstantially, parallel to the axis of the drum, gear wheels mounted onthe shaft and adapted to be selectively engaged by the peripheral teethof the drumfor revolving said drum in one direction when innormalposition and ma reverse direction when in discharging position, abeveled gear fixed to said shaft and juxtaposed the forward gear wheelthereon, laterally" extending and transversely alined arms formed onsaid beam to one side of said other arms, a driven shaft journaledtherein, and a beveled pinion gear on the inner end of the last;

named shaft and in mesh with the beveled gear of the first shaftsubstantially as de scribed.

In testimony that we claim the foregoing we have hereunto set our handsat Fredonia, in the county of Ozaukee and State of Wisconsin, in thepresence of two witnesses.

JOHN P. GILSON. WGHAEL GILSON.

Witnesses! HERBERT W. Wm, Evnmnr. Woes.

